01 2023 档案
摘要：141. Linked List Cycle Given head, the head of a linked list, determine if the linked list has a cycle in it. There is a cycle in a linked list if the
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摘要：19. Remove Nth Node From End of List Given the head of a linked list, remove the nth node from the end of the list and return its head. Constraints: T
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摘要：143. Reorder List You are given the head of a singly linked-list. The list can be represented as: L0 → L1 → … → Ln - 1 → Ln Reorder the list to be on
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摘要：21. Merge Two Sorted Lists You are given the heads of two sorted linked lists list1 and list2. Merge the two lists in a one sorted list. The list shou
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摘要：206. Reverse Linked List Given the head of a singly linked list, reverse the list, and return the reversed list. Constraints: The number of nodes in t
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摘要：33. Search in Rotated Sorted Array There is an integer array nums sorted in ascending order (with distinct values). Prior to being passed to your func
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摘要：153. Find Minimum in Rotated Sorted Array Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the ar
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摘要：20. Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An inpu
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摘要：76. Minimum Window Substring Given two strings s and t of lengths m and n respectively, return the minimum window substring of s such that every chara
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摘要：424. Longest Repeating Character Replacement You are given a string s and an integer k. You can choose any character of the string and change it to an
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摘要：3. Longest Substring Without Repeating Characters Given a string s, find the length of the longest substring without repeating characters. Constraints
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摘要：121. Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. You want to maximize
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摘要：11. Container With Most Water You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the i
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摘要：3Sum Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nu
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摘要：125. Valid Palindrome A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric cha
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摘要：128. Longest Consecutive Sequence Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. You must w
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摘要：271. Encode and Decode Strings 居然要premium才能做，果断换LintCode来写这题 Design an algorithm to encode a list of strings to a string. The encoded string is then s
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摘要：238. Product of Array Except Self Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements
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摘要：347. Top K Frequent Elements Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order
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摘要：49. Group Anagrams Given an array of strings strs, group the anagrams together. You can return the answer in any order. An Anagram is a word or phrase
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摘要：1. Two Sum Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume th
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摘要：242. Valid Anagram Given two strings s and t, return true if t is an anagram of s, and false otherwise. An Anagram is a word or phrase formed by rearr
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摘要：217. Contains Duplicate Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element i
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